Cylinder printing-machine



` (NoModeI.) a sheetssheet I.

J. HNCKEFIT.l CYLINDER PRINTING MACHINE.

No. 4222?. a Patented Feb. 25, 1890.

., I' Il (No Model.) 3 Sheets-Sheet 2.

J. HACKETT.

CYLINDER PRINTING MACHINE.

No. 422,206. Patented Feb. 25. 1890.

S14/vento@ n James Mll? @WW1/woo o 3 Sheets-Sheet 3. VJ. HACKETT.CYLINDER PRINTING MACHINE.

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UNITED STATES PATENT OFFICE.

JAMES HACKETT, OF TAUNTON, MASSACHUSETTS.

CYLINDER PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 422,206, dated February25, 1890. Application led May 21,1888. Serial No. 274,522. (No model.)

To all whom it may concern:

Be it known that LJAMEs HACKETT, a citizen of the United States,residing at Taunton, in the county of- Bristol and State ofMassachusetts, have invented a new and useful Improvement in CylinderPrinting Presses, of which the following is a specification.

My invention relates to an improvement in cylinder printing-presses; andit consists in the peculiar construction and combination of devices thatwill be more fully set forth hereinafter, and particularly pointed ontin the claims.

The object of my invention is to provide a cylinder printing-press Whichwill be exceedingly strong, durable, compact, simple in construction,readily operated, and capable of printing at great speed.

In the accompanying drawings, Figure l is a side elevation of a cylinderprinting-press Fig. 2 is a top plan view of the same, a portion of thereciprocating bed being removed. Fig. 3 is a.

vertical longitudinal sectional view taken on the line c of Fig. 2. Fig.4t is a vertical transverse sectional view taken on the line y y of Fig.2.

A represents the frame of the press, which comprises the sides B and thetransverse plates C, connecting the said sides at suitable distancesfrom their ends.

From the upper sides of the sides B, near one end thereof and inlinetransversely with each other, project vertical standards D, which havebearings E at their upper ends,in which are journaled the spindles atthe ends of the impression-cylinder F. On one end of the said cylinderis a miter gear-Wheel Gf.

H represents a longitudinal guide -rod, which is secured on the upperedges of the plates C, and is arranged parallel with the sides B andnearly midway between the same. The said plates C are further providedon their upper edges with series of vertical pairs of ears or standardsI, each of which is provided with a vertical open slot. In the said openslots are guided bearing blocks or boxes K, in each pair of Whiclrarejournaled the spindles of supportingwheels or rollers L, the latterbeing arranged at suitable distances apart, as shown in Figs. 2 and fi.ers support the bed of the press, and may be adjusted vertically for thepurpose of varying the impression,

The front plate C has a vertical central opening M, and the front andrear plates are connected by longitudinal parallel bars N, each of whichhas a longitudinal slot O. The said bars are arranged at regulardistances from the center of the frame, Also connecting the plates C isa pair of horizontal bars P, which are arranged in a lower plane thanthe guide-bars N and somewhat nearer ton gether, and have rack-teeth ontheir upper side.

R represents a circular disk or Wheel of suitable size, which isprovided on about three-fifths of its circumference with spur teeth S. Ashaft T extends through the cen-` ter of thev said wheel and is keyedthereto, and on the said shaft, on opposite sides of the wheel, aresecured smaller wheels or pin,

ions U, the teeth of which mesh with the rack-bars P. The ends of theshaft T are journaled in bearing-boxes V, which are arranged in andguided longitudinally by the slots O.

W represents a pair of vertical standards, which are arranged andsupported on a crossbar X near the front end of the frame, at the lowerside thereof, one of the said standards being arranged nearly in thecenter of the same, and the other standard near the sides thereof. Inthe said standards is journaled a transverse driving-shaft Y, which hasa driving-pulley Z at its outer end and a crank A at its inner end. Thesaid crank is connected to the shaft T by means of a pitlnan B', theinner end of which is bifurcated to form yoke-arms, which extend on theouter sides of the wheels U and are journaled to the shaft T.

Frein the foregoing description it will loel understood that when theshaft Y is rotated the crank `and pinion will cause the shaft T and itsbearing-blocks to move backward and forward in a horizontal plane, andthat the These rollwheels U by engaging with the rack-bars P,`

ends of its longitudinal movement.

C represents an inclined shaft, which is journaled in bearings D' on oneside of the machine-frame. The said shaft has at one end a miter-wheelE', that engages a similar wheel F', which is keyed to the shaft Y. Y

G' represents a nearly vertical shaft, which is journaled in bearings H'on the same side of the frame, has its lower end connected to the rearend of the shaft E' by means of miter-gears l', and has a miter-wheel Kat its upper end, which engages with the wheel G on theimpression-cylinder F.

From the foregoing description it will be understood that when the shaftY is rotated and the traveling spur-wheel R is moving back and forthcontinuous rotary motion will be imparted to the printing-cylinder byreason of the gear-shafts E' and G', which connect theimpressioncylinder with the drivingshaft Y.

On the inner sides of the sides B, near the upper edges thereof, arejournaled anti-friction rollers L'.

M' represents a horizontal bed, which is supported on the rollers L andL', and is arranged between the sides B. On the under side ofthe bed aredepending guides l :which engage the guide-bar H.

O' represents a longitudinal rack-bar, which depends from the center ofthe bed, vhas its .ends secured thereto, and has its upper sidesrecessed between its ends, so that the upper side of the rack-bar is outof contact with the opposing lower side of the bed, and said rack-barengages the spur-wheel R, and, as the latter moves backward and forwardand rotates first in one direction and then in a contrary direction, itfollows that the same imparts reciprocating motionto the bed, so as tomove the same first under the impressioncylinder and' then backward fromthe same. lnasmuch as the wheel R'is operated atan accelerated rate ofspeed by reason of the pinions U and rack-bars P, as before stated, itfollows that the bed will be moved by the said wheel R at acorrespondingly rapid rate, thereby causing the' printing-press tooperate very rapidly.

l have not illustrated the inking-rollers nor other necessary parts ofthe machine, because the same will be readily understood by personsskilled in this art and form no part of my present improvementA lt willbe observed that the wheel R and the rack O' are arranged directly underthe center of the bed, and that therefore the power is applied directlyto the bed, and hence the same is moved with greater certainty and withless strain than is possible when the operating-wheels engage rack-barsat the Sides of the bed. The guide-bar H and the guides N' serve todirect the bed inna .straight line and prevent thel same from vibratinglaterally, thus causing the impression-cylinder to take clearimpressions from the form.

By reason of the rack-bar 0' being supported at its ends and unsupportedat its intervening portion the same is adapted to spring under'thestrain exerted thereonby the wheel R Without imparting a springing orvertically vibratory motion to the bed, hence enabling the latter tooperate smoothly on the supporting-rolls and causing all parts of theform to be presented to the surface of the impression-cylinder withequal pressure, and thereby improving the quality of the work performedby the press.

Each block K is supported on a key or wedge p', by means of which thewheels L may be adjusted very accurately,`so as to preserve all parts ofthe surface of the bed in the same plane.

On the upper edges of the sides B are pivoted buttons or clamp-platesR', which are adapted to turn inward over the bed M', so as to keep thesame firmly seated on the supporting-rolls.

l-laving thus described my invention, l claim-da l. In a printing-press,the combination of the frame, the continuously-revolubleimpressioneylinder,'the reciprocating bed, the vertically-adj ustablefriction wheels or rollers supporting the latter, the rack-bar upon theunder side of the bed-plate, the rack-bars arranged longitudinally inthe frame, the transverse reciprocating shaft, having pinions meshingwith the rack-bars in the frame and a larger gear-wheel engaging therack-bar'of the bed-plate, and a transverse operating crank-shaftconnected by a bifurcated pitman with the transverse reciprocatingshaft, and counter-shafts and gearing to transmit motion from saidcrank-shaft to the impression-cylinder, substantially as set forth.

2. The combination of the frame, the transverse cross bars or plates,the longitudinal rack-bars connecting and having their ends secured tosaid plates, the guide-bars, like wise secured to said plates and havinglongitudinal horizontal slots, the boxes arranged to move in said slots,the transverse shaft journaled in said boxes, a transverse crankshaft, abifurcated pitman connecting the latter with the transversereciprocating shaft, and mechanism for rotating the latter andtransmitting motion therefrom to the reciprocating bed-plate,substantially as set forth.

3. AThe combination, in a cylinder printing press, of the drivingcrank-shaft, the impres sion-cylinder, gears, substantially as setforth, connecting the same to the drivingshaft, whereby theimpression-*cylinder is continuously rotated in one direction, therackbars P, the guides N, the pinions en- TOO IIO.

In testimony that I claim the foregoing as gaging the rack-bars, thegear-Wheel R, the

my oWn I have hereto affixed my signature 1n shaft T, arranged in theguides, and to which the pinions and Wheel R are keyed, the pitlpresence of two Witnesses. man connecting said shaft to the crank- 1shaft, and the reciprocating bed having the Witnesses: y raekbarengaging the Wheel R, substantially JOHN C. REYNOLDS, as described.PETER J. MGGLINN.

JAMES HACKETT.

